Thermostatic mold control



Aug. 25,. 925.

S. M. UDALE THERMOSTATIC MOLD CONTROL Filed May 11, 1923 v following is a specification.

Patented Aug. 1925.

UNITED STATES PATENT OFFICE.

STANLEY M. UDALE, OF DETROIT MICHIGAN, ASSIGNOR TO EARL HOLLEY, OF

DETROIT, MICHIGAN.

THERMOSTATIC MOLD CONTROL. v

Application filed May 11 1923. Swial no, 638,154.

To all whomz't may concern: I mold. This passage F lines up with a cor- Be it known that I, STANLEY M. UDALE, responding slot through the valve C, when a citizen of the United States, residing at the valve is in the open position. 893 Lothrop Ave., Detroit, in the county of The thermostatic element A is located in Wayne and State of Michigan,- have invent a rectangular opening J, the element A beed certain new and useful Improvements ing partly within the hollow mold E "and in Thermostatic Mold Controls, of which the partly without. K is a cover to protectthe thermostat A from any molten metal which This invention relates to the thermostatic may splash from the top of the mold E. control of the cooling fluid in a hollow per- The cover K also provides an outlet for the 'man'ent mold and specifically relates to the air which enters from G through'F C and control of the cooling means shown in the finally issues through J. L is a can screw co-pending application of De Forest W. which forms-an anchor for the thermostatic Chandl r, S i l No, 558,396, filed May 4, element A. M is a sector which is secured 1922 to the mold E. N is a pointer secured to In that application means are shown the throttle shaft B adapted to indicate by whereby air is blown through the mold its movement over the sector M. O is a cap d ri th int r l b t n th j tion of screw locating the sector M and also holding the casting and the pouring of the next sucthe cover K in place. The pointer N and ceeding casting. the sector M indicate when the device is In the continuous operation of a series of operating so that the operator knows when molds arranged on a rotating table as shown the supply of air through Gis inadequate. in the above mentioned application it may A V-shaped slot P in the circ mf r c f happen that one mold receives more iron the valve O permits a minimum amount of than another, the result being that that mold air to leak around the valve at all positions becomes hotter than the remaining molds. V of the valve. I

Under such circumstances the mold which Operation: Air enters through G and F is too hot should be given more cooling air and leaks around the valve C, through .the

than the molds which are not so hot and V-shaped slot P into the hollow mold E. this invention relates to thermostatic means This air issues around the thermostatic elefor distributing the cooling air to those ment A and down through the cover K. As molds which are hotter than the others so the temperature of the air issuing from K that the molds will be all at a uniform temrises the temperature responding elements perature, turn the valve C. When the temperature E Figure I shows a cross sectional plan rises above 900 F. the temperature of the air view through the device on the plane T l: rises to approximately 700 F. when the of Figure H.

Figure 11 shows a cross sectional eleva- B so that the slightest increaseputs the pipe tion through the plane TT-H of Figure I. G in free communication with the mold Figure HT is a fragmentary elevation through the slot in the valve G. The moof the air entrance to the mold. ment the valve C opens a considerable quan- Figure IV is a cross sectional elevation on tity of air flows into the moldE which imthe plane lV-TV in Figure I. mediately reduces the temperature of the In Figures'l and H, A is the thermoair issuing around A, through the slotJ and static element, preferably consisting of two to the atmosphere. This air flowing out at strips of dissimilar metal welded together. K immediately cools the thermostat1c ele- B is the control shaft supported in the side ment A and the shaft B 1s rotated so as to wall of the mold E.- C is a throttle valve close the slot in' the valve G and hence the integral with the shaft B. D is the cover temperature of the mold is kept within complate enclosing the valve 0. A flanged pipe paratively narrow limits, although no at- G flattened out at the end is bolted to the tempt is made to hold the temperature of the surface of the mold so that it lines up with mold within very close limits as the procthe slotted passage F in the surface of the ess, in connection with which this device thermostatic element A has rotated the shaftv is intended to operate, does not require close regulation. By arranging that the thermostatic element is never subjected to undue stresses, which'is frequently the cause of failure of the thermostatic element, the reliability of the device is increased.

What I claim is:

1. In a hollow mold, a cooling gas entrance, a valve located therein, a cooling gas exit, a temperature responding element located therein, interconnecting means whereby the movement of the temperature controlling element operates the Valve.

2. In a hollow mold, a cooling gas entrance, a valve located therein, a cooling gas exit, a freely expanding temperature responding element located therein, interconnecting means whereby the movement of the temperature controlling'elements operates the valve.

3. In a hollow mold, an air entrance thereto and an exit therefrom, a valve controlling the flow of cooling air through said mold, a temperature responding element located within said mold, interconnecting means between the temperature responding element and the valve whereby an increase in temperature produces an increased flow of cooling air through the said hollow mold.

In testimony whereof I aflix my signature.

STANLEY M. UDALE. 

